US 6,802,882 B2Granted

Nitrification inhibitors, and the use of polyacids which contain a nitrification inhibitor for the treatment of inorganic fertilizers

AssigneeBASF SE

InventorsThomas Barth, Norbert Rieber, Randall Evan Gold, Jürgen Dressel, Klaus Erhardt, Klaus Horchler von Locquengh, Edgar Leibold, Stefan Rittinger

Life of this patent

Estimating the term…

patentgrep

Loading patent…

Abstract

The use of inorganic or organic polyacids for the treatment of inorganic fertilizers, in particular the use of the polyacids as a mixture with at least one nitrification inhibitor for the treatment of inorganic fertilizers; the use of selected pyrazole derivatives as nitrification inhibitor in inorganic fertilizers and also as stabilizers of liquid manure or liquid fertilizer formulations, as well as the corresponding treated inorganic fertilizers per se; and novel pyrazole derivatives which can be used as nitrification inhibitors in inorganic fertilizers and also as stabilizers of liquid manure or liquid fertilizer formulations are described.

Claims2

Dependent claims

A method of stabilizing liquid manure or liquid fertilizer formulations comprising adding thereto at least one compound of the general formula

where R3 is a radical —CH2OH, the radical R1 is a hydrogen atom, a halogen atom, or a C1-4-alkyl radical, and the radical R2 is a C1-4-alkyl radical, with the exception of 1-hydroxymethyl-3-methylpyrazole, or
where the radical R3 is H, the radical R1 is a hydrogen atom or a C1-4-alkyl radical and the radical R2 is a C1-4-alkyl radical, with the exception of 3-methylpyrazole and 3,4-dimethylpyrazole, or
a salt of the compound where the radical R3 is H, the radical R1 is a hydrogen atom, a halogen atom, or a C1-4-alkyl radical, and the radical R2 is a C1-4-alkyl radical, with phosphoric acid, with the exception of 3-methylpyrazolephosphate and 4-bromo-3-methylpyrazolephosphate.

Dependencies are inferred from the claim text.

Facts

Application: 10/265,499Filed 7 Oct 2002 · division
Priority: DE 196 31 7646 Aug 1996
Published: US 2003/0145641 A17 Aug 2003
Granted: 12 Oct 2004
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

C07D 231/12
Having two or three double bonds between ring members or between ring members and non-ring members: with only hydrogen atoms, hydrocarbon or…
C05F 3/00
Fertilisers from human or animal excrements
C05G 3/90
Mixtures of one or more fertilisers with additives not having a specially fertilising activity: for affecting the nitrification of ammonium…
C07D 231/16
With hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals,…:…

Family

PCT/EP97/04278Parent of this division · filed 6 Aug 1997
Application09/680,195Parent of this division · filed 6 Oct 2000
US 2003/0145641 A1Pre-grant publication · published 7 Aug 2003
US 6,488,734 B1Parent of this division
Application09/230,841Parent of this division
US 6,139,596 AParent of this division
US 6,802,882 B2This patent

From the US filing history. Foreign family members aren’t listed.